英文關鍵字
river
stream
flowing
water
freshwater
rivers
flow
moving
supply
riverbed
big
group
geese
families
goslings
leading
goose
visible
egyptian
bird
alopochen
aegyptiaca
gray
european
arctic
northern
mosel
moselle
rhine
rin
rhein
koblenz
deutsches
eck
urban
wildlife